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Method of processing superfine fiber synthetic leather skin-imitated leather

A technology of superfine fiber and processing method, which is applied in the direction of fiber type, fiber treatment, dyeing method, etc., can solve the problems of not achieving the excellent performance of leather, and achieve the effect of improving drape, improving hygienic performance, and increasing hygienic performance

Active Publication Date: 2015-09-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using these technical means to process microfiber synthetic leather can improve the hygienic performance of superfine fiber synthetic leather to a certain extent, but it cannot reach the excellent performance of genuine leather.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The first step: the superfine fiber synthetic leather passes through the overflow dyeing machine, and the overflow dyeing machine adds water with a mass of 5000% of the dry base cloth, and raises the temperature to 50°C, and the base cloth stays in the water for 40 minutes to complete the washing treatment of the base cloth;

[0056] Step 2: Add 0.5% formic acid in the dry base cloth to the overflow dyeing machine, adjust the pH to 2.5, and keep the base cloth in the bath for 160 minutes;

[0057] Step 3: Add a cross-linking agent with 10% of the mass of the dry base cloth, and keep the base cloth in the bath for 120 minutes;

[0058] Step 4: Add 1.5% baking soda to the dry base cloth, and adjust the pH to 4.0;

[0059] Step 5: Add retanning agent with 15% mass of dry base cloth, stay in the bath liquid at 40°C for 80 minutes, complete the filling of base cloth, continue to add glutaraldehyde with 1% mass of dry base cloth Carry out secondary fixed cross-linking;

[0...

Embodiment 2

[0071] Step 1: The superfine fiber synthetic leather passes through the overflow dyeing machine, and the overflow dyeing machine adds water with a dry base cloth quality of 5000%, and raises the temperature to 55°C, and the base cloth stays in the water for 35 minutes to complete the washing treatment of the base cloth;

[0072] Step 2: Add formic acid of 1% of the mass of the dry base cloth to the overflow dyeing machine, adjust the pH to 2.0, and keep the base cloth in the bath solution for 165 minutes;

[0073] Step 3: Add a cross-linking agent of 8% of the mass of the dry base cloth, and keep the base cloth in the bath for 125 minutes;

[0074] Step 4: Add 1% baking soda to the dry base cloth to adjust the pH to 4.5;

[0075] Step 5: Add retanning agent with 11% mass of dry base cloth, stay the base cloth in the bath liquid for 75 minutes at 41°C, complete the filling of base cloth, continue to add 2% modified pentamethylene with dry base cloth mass Dialdehyde;

[0076] ...

Embodiment 3

[0087] The first step: the superfine fiber synthetic leather passes through the overflow dyeing machine, and the overflow dyeing machine adds water with a mass of 5000% of the dry base cloth, raises the temperature to 60°C, and keeps the base cloth in the water for 30 minutes to complete the washing treatment of the base cloth;

[0088] Step 2: Add 0.5% formic acid of the dry base cloth to the overflow dyeing machine, adjust the pH to 2.5, and keep the base cloth in the bath for 170 minutes;

[0089] Step 3: Add a cross-linking agent of 6% of the mass of the dry base cloth, and keep the base cloth in the bath for 130 minutes;

[0090] Step 4: Add 1.5% baking soda to the dry base cloth, and adjust the pH to 4.0;

[0091] Step 5: Add retanning agent with 7% mass of dry base cloth, stay base cloth in bath liquid for 70min at 42°C, complete filling of base cloth, continue to add oxazolidine with 4% mass of dry base cloth Carry out secondary fixed cross-linking;

[0092] Step 6: ...

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PUM

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Abstract

The invention relates to a method for processing superfine fiber synthetic leather skin-imitated leather. Superfine fiber synthetic leather is treated by adopting the traditional means, so that the hygienic property of the superfine fiber synthetic leather can be improved to a certain extent, but excellent performance of dermis can not be achieved. The method comprises the following steps: washing the superfine fiber synthetic leather in an overflow dyeing machine, regulating a pH value by adding a formic acid solution, carrying out crosslinking by adding a crosslinking agent solution, regulating a pH value by adding a sodium bicarbonate solution, finishing filling by adding a retanning agent solution, adding glutaraldehyde, modified glutaraldehyde, oxazolidine or an organic phosphine tanning agent, carrying out secondary fixed crosslinking, finishing fat liquoring by adding a fat-liquoring agent solution, dyeing, regulating a pH value by adding the formic acid solution, adding the crosslinking agent solution, carrying out third time of fixed crosslinking, adding the sodium bicarbonate solution, extracting alkali, washing, exiting the overflow dyeing machine, hanging and drying. According to the method disclosed by the invention, a macromolecular tanning agent is fully fixed among fibers, so that the amount of active group on the surface of a base cloth is increased, and performances, including the water vapor permeability, the hygroscopicity and the drapability, of the superfine fiber synthetic leather base cloth are improved.

Description

technical field [0001] The invention belongs to the technical field of superfine fiber synthetic leather, in particular to a method for processing superfine fiber synthetic leather imitation leather. Background technique [0002] Leather is a natural material formed by tightly woven collagen fibers, which has the advantages of good hand feeling and good water vapor permeability. Microfiber synthetic leather is the third generation of artificial leather currently developed. It is a composite material made of bundled superfine fiber and polyurethane through special processing, and has good physical and chemical properties. However, due to the fact that the polyamide fiber has very few active groups, it only has carboxyl and amino groups at the end of its molecular chain, and there are few active groups on the polyurethane, resulting in the synthetic leather's hand feeling, water permeability, and moisture permeability. The leather is much inferior in comparison. [0003] In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/00D06M13/123D06M13/352D06M13/382D06P3/32D06M101/34D06M101/38
Inventor 强涛涛王杨阳任龙芳王学川
Owner SHAANXI UNIV OF SCI & TECH
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